title: Relief from pain in obstetrics.
authors.forename: M J
authors.initials: MJ
authors.lastname: ELLIS
mesh_terms: D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D009774:Obstetrics; D010146:Pain; D004364:Pharmaceutical Preparations; D011247:Pregnancy; D014937:Work
chemical_list: D004364:Pharmaceutical Preparations